P0AA1

L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0AA1-231: Hybrid Battery Positive Contactor Circuit Stuck Closed
P0AA1-231 - Hybrid Battery Positive Contactor Circuit Stuck Closed

DESCRIPTION

Refer to the description for DTC P0AE6-225 P0AE6.





WIRING DIAGRAM

Refer to the wiring diagram for DTC P0AE6-225 P0AE6.

INSPECTION PROCEDURE

CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT
- Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
- If P0AA1-231 is stored, the hybrid system cannot be turned on.

PROCEDURE

1. CHECK DTC OUTPUT (HV)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

(d) Check if DTCs are output.

Result:









B -- GO TO DTC CHART Hybrid Control System
A -- Continue to next step.

2. CHECK FREEZE FRAME DATA

(a) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

(b) Read the freeze frame data of DTC P0AA1-231.

Result:





A -- REPLACE INVERTER WITH CONVERTER ASSEMBLY Installation
B -- Continue to next step.

3. CHECK HV BATTERY JUNCTION BLOCK

CAUTION:
Be sure to wear insulated gloves.

(a) Turn the power switch off.

(b) Remove the service plug grip Hybrid Control System.





NOTICE:
After removing the service plug grip, do not turn the power switch on (READY) unless instructed by the repair manual because this may cause a malfunction.

HINT
For the removal and installation procedures related to inspection of the HV battery junction block, Components.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:





HINT
- If a system main relay is stuck closed, impacts or vibrations during the inspection may cause it to open.
- If the result of reading the freeze frame data in the previous step was B, the HV battery junction block must be replaced. Measuring resistance can determine whether this is either a present or past malfunction.

NG -- REPLACE HV BATTERY JUNCTION BLOCK Components

OK -- REPLACE HV BATTERY JUNCTION BLOCK Components